Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678806 | Plate coolers for shaft furnaces | Hartmut Hille | 1997-10-21 |
| 5676908 | Plate for cooling shaft furnaces | Axel Kubbutat, Karl Spickermann | 1997-10-14 |
| 5650119 | Cooling plate for a blast furnance | Hartmut Hille | 1997-07-22 |